Amplitude Analysis of the B^{0}→K^{*0}μ^{+}μ^{-} Decay.



Aaij, R ORCID: 0000-0003-0533-1952, Abdelmotteleb, ASW, Abellan Beteta, C, Abudinén, F ORCID: 0000-0002-6737-3528, Ackernley, T ORCID: 0000-0002-5951-3498, Adeva, B, Adinolfi, M ORCID: 0000-0002-1326-1264, Adlarson, P ORCID: 0000-0001-6280-3851, Agapopoulou, C, Aidala, CA ORCID: 0000-0001-9540-4988
et al (show 1094 more authors) (2024) Amplitude Analysis of the B^{0}→K^{*0}μ^{+}μ^{-} Decay. Physical review letters, 132 (13). 131801-. ISSN 0031-9007, 1079-7114

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Abstract

An amplitude analysis of the B^{0}→K^{*0}μ^{+}μ^{-} decay is presented using a dataset corresponding to an integrated luminosity of 4.7  fb^{-1} of pp collision data collected with the LHCb experiment. For the first time, the coefficients associated to short-distance physics effects, sensitive to processes beyond the standard model, are extracted directly from the data through a q^{2}-unbinned amplitude analysis, where q^{2} is the μ^{+}μ^{-} invariant mass squared. Long-distance contributions, which originate from nonfactorizable QCD processes, are systematically investigated, and the most accurate assessment to date of their impact on the physical observables is obtained. The pattern of measured corrections to the short-distance couplings is found to be consistent with previous analyses of b- to s-quark transitions, with the largest discrepancy from the standard model predictions found to be at the level of 1.8 standard deviations. The global significance of the observed differences in the decay is 1.4 standard deviations.

Item Type: Article
Uncontrolled Keywords: LHCb Collaboration
Depositing User: Symplectic Admin
Date Deposited: 26 Jun 2024 15:43
Last Modified: 10 Dec 2024 12:37
DOI: 10.1103/physrevlett.132.131801
Open Access URL: https://journals.aps.org/prl/pdf/10.1103/PhysRevLe...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3182440